Summary:
- A combination reaction is a reaction in which two or more substances combine to form a single new substance.
- Combination reactions can also be called synthesis reactions.
- One sort of combination reaction that occurs frequently is the reaction of an element with oxygen to form an oxide.
- A wheel rim is not very useful by itself.
- When the rim is combined with a tire, the product can be put on a car and used for a safe and comfortable ride.
- The two separate items have combined to make something that improves the car ride.